Door-operating mechanism



A L. CRESCI. DODlR OPERATING MECHANISM.

APPLICATION FILED DEC. 18, 1918- v Patented Mar. 8, 1921.

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000R OPERATING MECHANISM.

APPLICATION FILED DEC. 18, 1918.

1,371,074, Patented Mar. 8, 1921.

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ANTHONY I. CRESGI, OF VINELAND, NEW JERSEY.

noon-OPERATING uncirnmsm'.

Specification of Letters Patent.-

Patented Mar. 8, 1921.

Application filed December 18, 1918. Serial- No. 267,255.

To all whom z't/may concern Be it known that I, ANTHONY L. Censor,

a citizen of the United States, residing at Vineland, in the county of Cumberland and State of New Jersey, have invented certain new and useful Improvements in Door- Operating Mechanism, of which the followin is a specification.

y invention relates to improvements in door operating mechanism, particularly adapted for garage doors. The object of my invention is to operate the door by an electric motor and to provide a switch for controlling the motor to open and close the door; a further object of my invention is to provide switches for stopping the motor automatically when the door reaches the open or closed position; a still further object of my invention is to provide a cushioning device for stopping the door without shock or jar after the motor is stopped, and a still further object of my invention is to provide a safety device for supporting the door in case the supporting cable should break.

Referring to the accompanying drawings; Figure 1, is a view in elevation showing a door and the door frame or guides and showing my invention embodied therein; Fig. 2, is a perspective view of a switch and the means for operating the same; and

Fig. 3, is a vertical section on line 33,'

Fig. 1.

n the accompanying drawings, in which like reference characters refer to like parts,

1 represents a door mounted in verticalguides 2 and 3 in which the door'slides vertically. The door is operated by an electric motor 5 adapted to rotate in either direction. A shaft 6 is driven by the motorthiough gear wheels 7 and '8, the belt 9 and belt pulley 10 secured to said shaft 6 or by any other suitable means. A flexible member 12, in the form'of a sprocket chain or cable, is secured to the door- 1 and to a counter-weight 14, the flexible member 12 passing over a sheave 15 and a pulley 16. The sheave 15 is driven by the shaft 6 through a friction clutch 18 interposed between the shaft 6 and the sheave l5. Said clutch 18 is adjusted so as to exert only the door is properly counter-balanced and to slip in case the motor is not stopped at the time the door is acted upon by the cushioning device. 1

The motor 5 is controlled by a hand switch 20, which may be located in any part of the building. The hand switch 20 controls two electric circuits for operating the motor 5 in different directions, to raise or lowerthe door. Said electric circuits are shown diagrammatically in the drawings. Each electric circuit from the hand switch 20 includes a switch operated automaticall by the door, which latter is provided wit a cam 22 for engaging the switch arms.

The said automatically operated switches 30 and 31 are similar in construction, each comprising a knife switch 34, inclosed in a casing 35 which is secured in a fixed position to the guide frame 2, or other stationary member. The pivoted knife 36 is moved by a connecting rod 37 attached to a lever 40 pivoted at one end in a fixed bearing 41. The free end of the lever 40 projectsinto the path of the cam 22 carried by the door. Said lever 10 is shaped in the form of a right angle so that the knife switches ma be located upon the side of the guide rame 2 opposite to the door. The lever 40 moves in a guide member 43 provided with a stop pin 44 against which the lever 40 is moved, by the action of a spring45, when the arm 40 is free from the cam 22 upon the door. Said lever 40 is also provided at its free end with a roller 46 which readily rides over the cam 22, which latter moves the lever 40 into the position in which the switch 31,

Fi 1, 'is shown, in which position theknife 36 has been moved and broken the circuit between the switch contact plates 38 and 39. The switch 30 in Fig.1 and also in Fig. 3 is shown in the closed position the switch 31 into the open position, broken the circuit and stopped the motor; the hand 7 lever 21 still remaining in its original posufiicient friction to move. the door when sition to close the circuit through conductors A and B which circuit includes the switch 31.

- thus the opposite circuit is closed, at'the are secured stops 56 and 57 which are en- I gaged by a bracket 59 carried by the door.-

By reversing-the hand switch 20, the opposite circuit will be completed through conductors A and C, including switch .which is in the closed position, and the motor will be operated in the direction to raise the door. When the cam 22 engages I the lever ofthe switch 30, said sw irtflh e will be opened and stop the-motor. other switch 31 will beclosed by the spring as soon as the door moves the cam-22 away from the lever 40, of said. switch 31;

switch 31, but still remains broken atthe hand switch 20. The switch 20 can again start the motor through either circuit which includes an automatic switch in the closed position. f

1 The cushioning device for, stopping the 1 doorwithout any jar, consists of the c lin- 20.

"Immediately .lefore the door reaches the limit of. its mbvement, in either directio n,. the bracket 59 .on. the door, 'by. commg 1ncontact with the stops 56 or 57 will move I the rod sufiiciently to force the piston 51 against the air in the cylinder 50. The air 61.which balances the weight of the rod and exhausts slowly through thevalvesi60 and retards the movement ofthe door. Said rod .52 is provided with a counterbalance-weightprevents the piston 51 from. moving in the cylinder due to-the weight of the rod. 1 'Iheflexible member 12 is connected to the doorthrough a head 63, slidably mounted ,in a bracket 64. The head 63 carries the 65 will be released and'the spring'69, 'at-' arm 65ofa pawl 66 pivoted onthe pin 67 secured upon the door. The freeend of the pawl 66 islocated adjacent to aitoothed rack 68 secured to the door frameB, sof'that if the flexible member 12 should break, the arm tached to said arm, will cause the-pawl to from falling engage the rack and thus prevent the door Myv invention isshown-. herewith in connection with a door but it may also be apin apparatus.

plied to elevators, dumb waiters and hoist-..

claim and desire to secure by tt'ers Patent 1. Inga oor, Qr theiIikaaframe inwhich" the drier s ."slidably mounted, an electric motor f0 moving ,docr,'an; 1e tpigi wit to opei at eith v otor,f.;;a jswitchf-iii the electric 'circuitsecured upon-saidframe, an arm pivotall mounted upon said frame adjacentt'o 'swit h,-;ia itonnecting rod between the arm the free end of-the armgadapted to be en- 1 cam.

" cuit to operate the motor, a knife switch conthe switch.

door, a rack secured in a I adaptedto, be engaged by thepawl, and an arm upon the pawl engagedlby the said head I 'dooris supportedb the flexible member. aving thus described 111 invent1on .I

"counter-balance; l ne b r. the

said heajdis mov i switch, a casingfinclosing said I v What 7 and the switch extending into said casing, and acam to operate saidarm when the door is in 'a' position to bring the cam-and the arm into engagement and thereby break thecircuit and stop the motor.

2. In a door, or the like, a frame in which the door is sli-dably 'mounted, .an electric motor for moving the door, an electric circuit to operate the motor, a switch connected in said circuit, said switch secured upon said "frame, a cam upon the door, an 'L-shaped. arm extending into the path of the cam, a bearing upon the frame-in which said arm is pivotally mounted, a connecting rod be-- tween the arm and said switch, a roller upon gaged by the 'said cam and move said arm, and a spring for moving the said arm in the opposite direction'whennot engaged by the 3. In a door, orthelike, a frame in which the door is slidablymounted, anelectric motor for moving the door, an electric cirnected' in said circuit, said switch secured upon said frame, an'arm, a bearing upon the. frame in which the arm is pivoted, a connecting rod between the arm and the knife switch, a U-shapedplate se'cured'upon the frame-for guiding the arm, a spring to move the arm and: close the switch, and a cam upon the door. adapted to move the "arm against the. action of said spring and open 4. In a door, or the like, an electric motor for operating the door, electric circuits for operatingrthe motor, switches located inthe said circuits, a double faced cam upon the door for. actuating either switch when thedoor is in either extreme position, a cylinder forminga compression chamber, a piston in i said cylinder, a counter-balance weight attached to said piston, and means actuated by the door for moving the piston'in relation to the cylinder when either of saighswitches is thrown out to stop the motor, a

- 5. In .a door, or the like, a bracket secure 'to the door, a, movable head insaid bracket,

a flexible'member connected with the head.

for lifting .thedoor, a 'pawl pivoted upon the fixed position forholding the pawl out of action when the 120 6. Infadoor, or t e like, operating means,

- a friction clutch driven by thesaid operat v 1 'ing means, 'a sheave'jdriven by'th'e clutch, a

flexible member 1 d il whic H o n y mounted, a 'pawl.- cone; trolledaby said head for 'stoppingthedooj'r lam-ins. the flexible member;

cylinder secured in a fixed position, a piston pawl for moving the door and for holding in said cylinder, means upon the door for the pawl out of enga ement with the frame, moving the piston against the pressure in and a bracket upon the door to limit the said cylinder, and a counter-balance-weight movement of the pawl by said member. 5 attached to said piston. In testimony whereof I afiix my signature 1:;

7 In a door, or the like, a frame in which in the presence of two witnesses. the door is slid'ably mounted, a pawl pivoted ANTHONY L. CRESCI. upon the door adapted to engage the said Witnesses: frame and hold the door in relation to the BENJAMIN STEVENS, 10 frame, a flexible member connected with the FRANK DE LUoo. 

